MIMO-OFDM radar waveform design for improving the detection performance of STAP

摘要

In this paper, we address the waveform optimization problem for improving the detection performance of MIMO-OFDM radar based STAP in the complex environment. Under the maximizing the output signal-to-interference-and-noise-ratio (SINR) criterion, the waveform optimization problem for improving the detection performance of STAP is derived, which is subjected to the constant modulus constraint. To tackle the resultant nonlinear and complicated optimization issue, a novel diagonal loading (DL) based method is proposed to reformulate it as a semidefinite programming (SDP) one, and then this problem can be solved very efficiently. In what follows, the optimized waveform covariance matrix (WCM) can be obtained to maximize the output SINR of MIMO-OFDM such that the detection performance of STAP can be improved. The simulation results show that the proposed method can improve the output SINR detection performance considerably, as compared to that of uncorrelated waveforms.